Using NMAP

Nmap (Network mapper) is a dope open-source tool for seeing what's going on networks and how security is looking.

"Nmap uses raw IP packets in a novel way to determine the hosts available on the network, the services they offer (application name and version), and the operating systems they are running (and operating systems). version). It’s designed to scan large networks quickly but works well with a single host."

# Single target scan:
nmap [target]
nmap subdomain.server.com

# Scan from a list of targets:
nmap -iL [list.txt]
nmap 192.168.0.1 192.168.0.2 192.168.0.3

# Scan with Exclude
nmap 192.168.0.* --exclude 192.168.0.2

# iPv6:
nmap -6 [target]

# OS detection:
nmap -O --osscan_guess [target]

# Save output to text file:
nmap -oN [output.txt] [target]

# Save output to xml file:
nmap -oX [output.xml] [target]

# Scan a specific port:
nmap -source-port [port] [target]

# Do an aggressive scan:
nmap -A [target]

# Speedup your scan:
# -n => disable ReverseDNS
# --min-rate=X => min X packets / sec
nmap -T5 --min-parallelism=50 -n --min-rate=300 [target]

# Traceroute:
nmap -traceroute [target]

# Ping scan only: -sP
# Don't ping:     -PN <- Use full if a host don't reply to a ping.
# TCP SYN ping:   -PS
# TCP ACK ping:   -PA
# UDP ping:       -PU
# ARP ping:       -PR

# Example: Ping scan all machines on a class C network
nmap -sP 192.168.0.0/24

# Force TCP scan: -sT
# Force UDP scan: -sU

# Use some script:
nmap --script default,safe

# Loads the script in the default category, the banner script, and all .nse files in the directory /home/user/customscripts.
nmap --script default,banner,/home/user/customscripts

# Loads all scripts whose name starts with http-, such as http-auth and http-open-proxy.
nmap --script 'http-*'

# Loads every script except for those in the intrusive category.
nmap --script "not intrusive"

# Loads those scripts that are in both the default and safe categories.
nmap --script "default and safe"

# Loads scripts in the default, safe, or intrusive categories, except for those whose names start with http-.
nmap --script "(default or safe or intrusive) and not http-*"

# Scan for the heartbleed
# -pT:443 => Scan only port 443 with TCP (T:)
nmap -T5 --min-parallelism=50 -n --script "ssl-heartbleed" -pT:443 127.0.0.1

# Show all informations (debug mode)
nmap -d ...